Sodium Acrylic Acid/Ma Copolymer
INCI: SODIUM ACRYLIC ACID/MA COPOLYMER
Reviewed by Daisy · Last updated 14 Aug 2026
A synthetic thickener that stabilises texture and consistency in skincare formulations
Best For Skin Types
All
Usage Frequency
Daily
What Is Sodium Acrylic Acid/Ma Copolymer?
Sodium Acrylic Acid/MA Copolymer is a synthetic polymer—a long-chain molecule made from acrylic acid and maleic acid units. It functions as a rheology modifier, meaning it controls how a product flows and feels on the skin.
This ingredient is used primarily to thicken formulations and improve their stability over time. It helps prevent separation of ingredients and maintains an even consistency, which is particularly useful in gels, serums, and lightweight moisturisers where a smooth texture is desired.
How It Works
Sodium Acrylic Acid/MA Copolymer works by forming a three-dimensional network within a product's base liquid. This network traps water and other ingredients, increasing viscosity—essentially making the product thicker and more stable without adding heavy oils or waxes.
The polymer itself remains on the surface of the skin and does not penetrate into deeper layers. Its role is purely structural: to hold the formula together and ensure it applies evenly and consistently.
Clinical Evidence & References
Limited clinical research exists specifically on Sodium Acrylic Acid/MA Copolymer as a skincare ingredient in isolation. It has been used in cosmetics for decades and is approved for use in personal care products across major regulatory bodies, including the European Commission.
Its safety profile is well-established in the cosmetic industry, though evidence for direct skin benefits comes from its functional role—maintaining product stability and texture—rather than from direct biological effects on skin.
How to Use
This ingredient requires no special application technique; it functions invisibly within the formula. Simply use the product as directed. If you have switched to a gel or lightweight serum containing this polymer, you may notice the texture feels thinner than heavier creams, but the product's stability and delivery of other active ingredients remains intact.
Safety & Precautions
Frequently Asked Questions
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